Bart Treece, WSDOT communications, 206-440-4473
Temporary repairs to minimize construction detours this summer
OSO – Drivers will now have an easier time crossing the section of State Route 530 damaged by this spring’s landslide. Contractor crews from Guy F. Atkinson Construction reopened the roadway to two-way traffic around 5 p.m. Friday, June 20.
Crews have spent the past week patching, repaving and restriping damaged sections of SR 530 to allow for safe travel in both directions. Since late May, traffic had been operating on a one-way basis, with a pilot car alternating directions of travel based on demand.
“This temporary roadway will help to strengthen connections between Arlington, Oso and Darrington, as well as the rest of our state, just in time for summer visits to local events,” said Washington State Department of Transportation Regional Administrator Lorena Eng. “We would like to thank these communities for their patience as we build a new, permanent roadway that will be more resilient into the future.”
Rules of the road
• The speed limit will remain 25 mph to protect the safety of construction workers.
• There are no restrictions for height and size of vehicles, but oversized loads will need a permit.
• For safety reasons, stopping or pulling over along this stretch of highway is not allowed.
• Periodically during construction, drivers can expect to see flaggers on the temporary roadway to ensure safe movement of construction equipment and vehicles.
Next steps for the permanent road
Crews will work throughout the summer to build a permanent new section of SR 530 south of the temporarily repaired roadway.
The landslide changed the geography of the valley floor and the Stillaguamish River North Fork, increasing the chance of flooding along the corridor. As a result, the roadway must be rebuilt and elevated. This work is expected to begin by early July, starting on the east side of the slide area and moving west. Substantial completion of the new alignment is expected in early October.
On several occasions, traffic will need to return to the Seattle City Light access road during construction. These detours, which may last up to 31 hours, will be scheduled during the week as often as possible to minimize impacts to the community and avoid disrupting major summer events in the area. Construction detours will be posted in advance online and emailed to subscribers of the SR 530 update list.
Emergency relief funds from the Federal Highway Administration will cover the $28.1 million cost of the SR 530 reconstruction project.